Abstract: In a projection device including a lamp unit detachably connected with a unit containing the optical condenser system, the lamp unit containing a concave mirror and an electric bulb mounted in a socket, the bulb being movable for the purpose of centering its filament coil in relation to the mirror and the condenser unit being fixedly mounted in a projection device while the lamp unit is merely supported by the condenser unit, the connecting means are so designed as to connect the lamp unit mechanically to the condenser unit as well as forming an electrical connection between the bulb socket and the terminal parts of the condenser unit. The connecting elements are secured to one of two units and extend parallel to the optical axis of the light fixture, the other of the units having guide recesses into which the connecting elements are inserted in the manner of a plug connection.

Abstract: Apparatus for reading images from an image carrier, such as a microfiche. The apparatus includes a mechanism for holding the image carrier between two glass plates as the carrier is moved across the optical plane of a corresponding optical system. These glass plates are pressed together in the area of the optical axis so as to ensure that the image carrier is held in a flat position when it is being viewed through the optical system. When the holding mechanism is moved to one end position so as to be substantially withdrawn from the reading apparatus, however, one of the glass plates is automatically swiveled out and away from the other glass plate so as to allow an image carrier to either be removed or inserted between the glass plates.